Machine for extracting threads from fabrics.



G. KELLER.

MACHINE FOR EXTRACTING THREADS FROM FABRICS- APPLICATION FILED JUNE 13. 1914.

1,279,876. Patented Sept. 24,1918.

3 SHEETS-SHEET 1.

M f T fi Z 2 Ww/zesses: [ml/6W" G. KELLER. MACHINE FOR EXTRACTING THREADS FROM FABRICS. APPLICATION FILED JUNE 13, 1914.-

1,279,876. Patented Sept. 24,1918.

3 SHEETS-SHEET 2.

.G. KELLER.

MACHENE FOR EXTRACTING THREADS FROM FABRICS.

APPLICATION man JUNE 13. I914.

Patented Sept. 24, 1918.

3 SHEETS-SHEET 3- .Jnue/z Z07 fwd/u @4431" UNITED sTATEs PATEN OFFICE. a

GUSTAV KELLER, or VIENNA, AUSTRIA, ASSIGNOR To DR. FREDERICK MINTZ, or

VIENNA, AUSTRIA.

MACHINE FOR EXTRACTING THREADS FROM FABRICS.

Specification of Letters Patent. Patented Sept, 24;, 1918.

Application filed June 13, 1914. Serial No. 844,897.

To all whom it may concern Be it known that I, GUSTAV KELLER, a subject of the Emperor of Germany, and a resident of Vienna, in the Empire of Austria, have invented Machines for Extracting Threads from Fabrics, of which the following is a specification.

The invention consists in a machine for extracting threads from fabrics, for the manufacture of open work of any kind. Machines of this kind as known heretofore, have been provided with a wedge shaped, saw blade, extracting needle coacting with a knife, tongs or the like arranged below the needle and performing either a rectilinear or an oscillatory motion.

The present invention consists in that the working point of the needle in the fabric is displaceable. The motion imparted to the needle can be either a rocking or a rotary motion or both a rocking and a rotary motion. If a rocking motion is imparted to the needle in the direction of its teeth, at the moment the needle point enters the fabric then the breadth of the opening is independent'of the shape of the needle- While.

with the machines as known heretofore, the breadth of the open work is determined by the angle of the Wedge of the extracting needle. Oscillation of the needle permits the use of a straight and pointed needle instead of a wedge-shaped one. Furthermore by such straight needle different breadths of the open work are obtainable, according to the width of the oscillating stroke, which may be preferably adjustable.

In the accompanying drawings, one embodiment of the invention is shown by way of example.

Figure 1 is chine, Fig. 2

Fig. 3 is an end View of the machine, the work support being out according to lines a-a of Fig. 1; Fig. 4 shows the driving means for imparting a rocking motion to the needle; Fig. 5 shows a plan view 'of the said driving means; Fig. 6 is a perspective view of the device by which the threads pulled out by the needle are cut off by the same, the needle constituting a cutting blade; Fig. 7 illustrates the arrangement of such a device beneath the work support of themachine, together a side elevation of the ma is a plan of the same with parts broken away;

with the driving means for the said device;

Fig. 8 shows a modified form of the ex tracting needle; Fig. .9 shows on a large scale a cross section of theneedle; Fig. 10 1s a sectional view of a detail; Fig. 11 is an enlarged front view of the improved needle showing its relation to the jaws through which it passes. An enlarged section of fabric is also seen in this view. Fig. 127is a still further enlarged view showing a cross-section of the needle and a plan of the upper portions of the jaws. Fig. 13 is a side elevation of the lower portion of the needle shown on about the scale of Fig. 12. Fig. 14 is an enlarged detail of a portion of fabric and a cross-section of the needle, also on about the scale of Fig. 12, and Figs. 15 and 16 are details of the cam and associated mechanism for controlling the jaws through which the needle passes. 7

All working motions of the machine are derived from the main shaft 1 transmitting its motion to the needle rod 4 by means of a crank 2 and a connecting rod 3, the rod 4. carrying the toothed extracting needle 5. According to the embodiment shown the needle is not wedge-shaped, as with the machines of this type as known heretofore, but straight (Fig. 8). By rotating the main shaft 1 the needle is alternately raised and lowered; on its descent the teeth of the needle draw the threads to be removed, from the fabric which is clamped between the plate 6 and the presser-foot 7. The teeth of the needle grasp the threads laying close to each other and pull them downwardly, whereupon they are cut off in a known manner by means of a knife or cutter working below the plate, the fabric being simulta neously advanced.

According to the invention the point of attack or engagement of the teeth of the needle with the fabric may be shifted. In the illustrated example, this object is attained by imparting tothe needle a turning movement on its own axis through an angle of 180 on the one hand, and anoscillating or rocking motion on the other hand. Both movements are derived from the main shaft 1, for example by means of a cam piece 8 or the like and of a cam 9 or the like (Figs. 1, 4 and 5), driven from the main shaft 1 by means of suitable intermediate gears 10, 11.

The cam 8 serves to produce the rocking movement or oscillating motion while the rotating movement or turning of the needle upon its own axis is derived from the cam 9. The needle rod 4 is guided in a movable frame 14 mounted on pivots 12, 13, carried by the main frame of the machine; the frame 14 is rocked by means of an oscillating lever 17, which transmits its oscillating motion to the frame 14: by means of a rod 15. The rocking motion of the lever 17 is derived from the cam 8 by means of a pin 18 operating in a cam groove of the cam 8. In order to control the amplitude of the rocking movement of the extracting needle 5, according to the modification shown, the point of connecting the rod 15 to the lever 17 is adjustable. The lever 17 is shown provided with a longitudinal groove in which is mounted a pivot pin 19 carried by the rod 15. The pivot pin is adjustably secured in position in the groove and the amplitude of oscillation is thereby adjustable, from maxi mum to zero. In order to obtain a 180 rotary motion of the needle upon its own axis, which, in the embodiment shown, is effected after each ascent of the needle, the needle rod 1 is mounted with its upper-part in a shell 20 joined to the rod in such a way as to rotate with the latter, yet to allow of a sliding movement of the latter within the shell. The connection between the needle rod at and the shell 20 is effected, for example, by means of a tongue 24: fixed to a projecting part of the shell, and a longitudinal slot 25 in the needle rod, for receiving the said tongue.

The shell is provided at its upper part with atwis'ted or screwlike member 21. It will be readily understood that by imparting a rotating movement to this member 21, the needle rod 4 is turned upon its axis to an extent determined by the twist of such memher. The rotating movement of the said member is produced for example by means of a rocking lever 22 pivotally mounted to the main frame of the machine, the said lever being rocked by means of the cam 9 and a rod 23.

Thepath of movement of the needle inci dent to its oscillating or rocking motion, as may readily be seen from Fig. 1, is transversely of the direction of feed or advance of the fabric. The working range or stroke of the needle is adjustable at will by adjusting the extent of its rocking motion. By turning the needle upon its own axis 180 when in its lifted position, the teeth operate in opposite directions at successive descents of the needle, whereby both borders of the open-work in the fabric are equally operated upon. By arranging the needle eccentrically with regard to its axis of rotation, the working or extracting path of the needle may be doubled, according to the eccentricity. preference one of the said motions,

for example, the rocking or oscillating motion may be suspended, as before described, in order to cause the needle to operate by its rotation only, such operation being quite suflicient for open work of narrow breadth.

The threads of the fabric, caught by the extracting needle and drawn downwardly are cut off below the plate 6, whereby in the embodiments of Fi gs. 3, 6 and 7 the extracting needle with its straight cross section corner forms one knife while the second knife 26' rests upon one check 28 of a pincers 28, 29 arranged under the plate. The knife 26 forms with the extracting needle 5 a shears in the manner illustrated in Figs. 11 to 14 of the drawings. When the needle 5 is thrust into the fabric 15, the toothing of it takes hold of one or several threads and carries the pieces of thread downward. If such a piece of thread is long enough, then it is carried by the active tooth 46 so far downward that it'enters between this tooth and the'knife 26, then the straight sides 4C7 of the tooth and the knife 200p erate as shears which out off the thread (see especially Fig. 11).

Figs. 15 and '16 show the shape of the cams 32, 32; which act on the lever arms 30 and 31, and how they bring into operation, first the knife 26 by means of the lever arm 30 and somewhat later the abutment 27 by means of the lever arm 31. Fig. 15 shows the position of the lever arms 30, 31, in which the knife 26 lies against the needle. After a slight rotation of the cam in the direction of the arrow the abutment 27 comes to its position. The members 26 and 27 constitute a pair of cutting blades adapted to alternately act as coiiperative cutters with the needle and as supports for the needle during cutting, as the needle is moved from side to side, each of said blades being in position to serve as a support for-"the side of the needle while it is in cutting relation with the other blade.

According to the described modification, the needle rod performs a to-and-fro r0 tating motion of 180. Instead of such toand-fro but continuously in the same direction could be provided for at each ascent of the needle.

Having now described the nature of my invention, what I claim, is:

1. In a machine for extracting threads from fabric, the combination with an extracting needle provided with teeth on one edge, of means for imparting to the extracting needle a movement whereby the point of attack or engagement of the teeth of the needle with the threads of the fabric may be shifted therein.

motion also a rotation by 180,

2. In a machine for extracting threads 'cillate perpendicularly to the direction of late perpendicularly to the direction of motion of the fabric, of means for oscillating the said needle and means for adjusting the amplitude of the said oscillation.

4. A thread extracting machine as claimed in claim 1, in which the extracting needle is adapted to so turn that the teeth of the same may be caused to work on both sides of the place where the fabric is pierced by the needle.

5. A thread extracting machine as claimed in claim 1, in which the extracting needle is adapted to rock as well asto turn.

6. A thread extracting machine as claimed in claim 2, in which the needle is adapted to rock as well as to turn.

7 A thread extracting machine as claimed in claim 3, in which the needle is adapted to rock as well as to turn.

8. A thread extracting machine as claimed 0 in claim 3, in which the needle is mounted eccentrically in relation to its-axis of oscillation.

9. A thread extracting machine as claimed in claim 4, in which one of the two different kindsof movement of the extracting needle, 2'. 6., the oscillating or rocking movement, may be stopped.

10. An extracting needle provided on its edge with teeth, the needle being of substantially the same cross-section throughout the length of the toothed portion.

11. A thread extracting machine as claimed in claim 1, having a needle plate and a knife blade rockably mounted beneath the'needle plate in cooperation with which knife blade the extracting needle is adapted to act.

12. In a thread extracting machine, the combination with an extracting needle provided on its edge with teeth, the needle being of substantially the same cross-section throughout the length of the toothed portion, of a needle plate, a pair of movable jaws provided with knife blades, and means for actuating the jaws, whereby one coacts with the extracting needle after the manner of shears, and the other forms an abutment for the needle during the cutting operation.

13. In a' machine for extracting threads from fabric, the combination with a recip-.

rocatory extracting needle, said needle being mounted for oscillation perpendicularly to the direction of motion of the fabric and rotatable upon an axis parallel with its path of reciprocation, and means for effecting the said oscillation and rotation of the said extracting needle.

14. In a machine for extracting threads from fabric, the combination with a pointed,

straight edged extracting needle provided with teeth upon the said straight edge, and mechanism for passing the said needle in and out of the fabric in a path parallel with the said straight toothed edge.

15. In a machine for extracting threads from fabric, the combination with a work.

support, a reciprocatory needle having its path of movement from above to below the said work support, and a cutting blade mounted below the said work support and cooperative with the said extracting needle for shearing the threads of the fabric, the said cutting blade being mounted to rock toward and from the path of needle movement in the manner of the jaw of tongs, and an abutment for engaging and supporting the side of the needle opposite the blade engaging side, said abutment being formed as the other jaw of the said tongs.

16. In a machine for extracting'threads from fabric, the combination with a work support, a reciprocatory needle having one of its edges provided with teeth, means for oscillatingthe needle during its reciprocation, and a pair of cutting lades mounted below the Work support, said blades being adapted to alternately act as cooperative cutters with the needle and as supports for the needle, during cutting.

17. In a machine for extracting threads from fabric, the combination with a work support, a reciprocatory needle having one of its edges provided with teeth, and a pair of blades located in position to alternately co-act with the needle in its cutting and extracting operation, each of said blades be ing in position to serve as a support for the side of the needle while it is in cutting relation with the other blade.

In witness whereof I have hereunto signed my name in the presence of two subscribing Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. G. 

